package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService executorService= Executors.newFixedThreadPool(3);
        for (int i = 0; i < 5; i++){
            Runnable r=new Runnable() {
                public void run(){
                    try {
                        Thread t=Thread.currentThread();
                        System.out.println(t.getName()+"正在执行一个任务");
                        Thread.sleep(2500);
                    }catch (InterruptedException e){
                        e.printStackTrace();
                    }
                }
            };
            executorService.execute(r);
            System.out.println("将一个任务交给了线程池");
        }
        executorService.shutdown();
        System.out.println("线程池关闭了");
    }
}
